senator marco rubio is taking a second crack at science. he's trying again. he's clarifying an answer he gave gq last month when asked about the age of the earth. rubio took some grief for saying in part he was not qualified to answer. >> he's not a scientists, man. >> calling it one of life's great mysteries. >> that and like why is hair growing on my knuckles. >> we should ask him. at a breakfast yesterday, mark allen gave the senator a chance to explain his answer. >> so how old do you think the earth is? >> let me tell you the answer i gave. the answer i gave was trying to make the same point the president made a few years ago. that is there is no scientific debate on the age of the earth. it's established at a pretty definitively, at least 4.5 billion years old. i was referring to a thee lodgeal debate which is a pretty healthy debate. >> that's good. >> rubio said he wished he had explained his point more clearly in the gq article and joked it deposit get much attention outside of washington. >> you know, actually, i think that was a good answer. >> tha